Is It True, If You Love Them Let Them Go, If They Come Back They Are Yours?!?

My boyfriend and I had a fight. We are both at fault but he started this whole fight with one comment abut my family, and we didn't talk for 2 days, so far. I gave him some space, and he won't call or text, and neither will I. If he loves me, will he try to solve this and call? Or once I let him go, it's over?!